Agated channel in a cell membrane allows a. osmosis. b. simple diffusion. c. active transport. d. facilitated diffusion

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

The relationship between intron and exon